Does putting your clothes outside help a lost pet come home?
Nobody has tested it. Dogs do respond to a familiar person’s scent, so a worn shirt at the last-seen spot is a low-cost try, not a proven method.
The honest answer
Nobody knows for sure. We found no study that tested whether clothing left outside brings a lost dog or cat home. What exists is indirect lab research on how dogs respond to familiar human scent, plus advice from people who search for lost pets. Together these make it a reasonable thing to try, since it costs almost nothing and takes two minutes. It is not a proven method, and a shirt on the porch is not a search. Put one worn item where your pet was last seen, then spend your time on the things with better evidence behind them: walking the area, calling shelters, knocking on doors and posting flyers.
What the research shows about dogs
Two small studies are worth knowing. In a brain imaging study led by Gregory Berns at Emory University, published in Behavioural Processes, 12 trained dogs smelled samples collected on gauze. A reward-linked part of the brain, the caudate, responded most strongly to the scent of a familiar human who was not present. In a separate 2021 study by Horii and colleagues, 12 dogs left alone without their owners spent longer investigating the owner’s sock than a lavender oil control, and some lay near it for long periods. So a dog can tell your scent apart from others, and it seems to mean something to it. Neither study involved a lost dog, an outdoor setting, or any distance. Liking a smell in a lab is a long way from following one home across a neighborhood.
What is not known
Several basic questions have no answer we could find. We do not know how far a dog can detect a shirt in open air, or how long the scent lasts in rain, wind or heat. We do not know whether a frightened dog in flight behaves the way a calm dog does. For cats, we found no comparable research on owner clothing at all, so anything you read saying that cats follow your scent home is opinion. The same goes for putting a litter box outside, which we also found no test of. Be cautious of any distance figure quoted on a website, unless it names a study you can read.
What practitioners advise
This is experience, not evidence. Lost Dogs of Wisconsin, a volunteer group, tells owners to put out food, water and the dog’s bed or an article of clothing at the place the dog was last seen, and says there is a good chance the dog may return. Onalisa Hoodes, a lost dog finder in Santa Barbara County, told the Independent newspaper to use whatever your dog is most bonded to. If that is you, she suggests the dirtiest, smelliest thing you have, such as a pillowcase you have slept on for days. Practitioners see some dogs return and credit the item, but that cannot be told apart from a dog that would have come back anyway.
Which item and where
Pick something that smells strongly of the person your pet is closest to. A worn shirt, an unwashed pillowcase or a used towel will do, or your pet’s own bed. Use one item, or at most a few. Put it at the last-seen spot, usually the door or gate it left from, or the spot where you last saw it on a walk. In the ASPCA survey, 20 percent of recovered dogs came back on their own and 59 percent of recovered cats did, and Huang’s cat study found 19 percent of cats found alive waiting outside home. So the home itself is worth covering. Weigh the item down, or tie it to something so it does not blow into the road. Keep it out of full rain if you can, under a porch or chair. Replace it when it gets soaked.
How far to spread it
Practitioners do not agree here, and no test settles it. Hoodes describes placing scent items through the mapped search area and around the owner’s home, and building a scent trail to a feeding station. The Lost Dogs of Wisconsin checklist names just the last-seen spot. Our advice for most owners is to keep it simple and stick to one or two places. The reasoning is practical. You can check them daily, and you avoid leaving belongings across other people’s property. Add a piece of paper with your phone number, in a plastic sleeve, so that anyone who finds the item knows why it is there.
Things to watch for
Keep a few things in mind. Food beside the item will attract raccoons, opossums, skunks and neighbors’ cats, so put out only a small amount and remove leftovers. Avoid putting anything out on a busy road, because you do not want to draw your pet toward traffic. Ask before you leave anything on land that is not yours. If you may use a search dog, bag a separate item first, unwashed and untouched, so that you have a clean scent sample. Our post on how to set up a feeding station for a lost dog covers what to do if you start to see signs of your dog returning to a spot.
How to tell if it is working
A shirt that has moved tells you nothing by itself, since wind and animals move things too. A cheap camera pointed at the item gives you an answer. Otherwise look for paw prints in soft ground, or dust some cornstarch around the item and check it in the morning. Check at dawn and after dark, and stay quiet when you go out. If a pet shows up, do not rush at it. Sit down, look away and let it come to you. If nothing shows up after several days, leave the item out, and keep your energy on posters, shelter visits and following up on sightings.
Sources
Berns et al., as reported by Phys.org, March 2014: phys.org/news/2014-03-scent-familiar-linger-perfume-dog.pdf. Horii et al., Animal Behaviour and Management, 2021: jstage.jst.go.jp/browse/jabm/57/1/_contents/-char/en. Lost Dogs of Wisconsin: lostdogsofwisconsin.org. Santa Barbara Independent, How to Find Your Lost Dog, June 2025: independent.com/?p=625031. Weiss et al., Animals, 2012: pmc.ncbi.nlm.nih.gov/articles/PMC4494319. Huang et al., Animals, 2018: pmc.ncbi.nlm.nih.gov/articles/PMC5789300. Lost Dog Tracking Network, scent items: northk9.co.uk/LDTN/?p=283.